题目内容
下面各题对吗?把不对的改正过来.
7-3×
改正:
=4×
=
+
×
改正:
=1×
=
.
7-3×
| 5 |
| 12 |
=4×
| 5 |
| 12 |
=
| 5 |
| 3 |
| 7 |
| 13 |
| 6 |
| 13 |
| 13 |
| 12 |
=1×
| 13 |
| 12 |
=
| 13 |
| 12 |
(1)错误,
改正:
7-3×
,
=7-
,
=
,
(2)错误,
改正:
+
×
,
=
+
,
=
.
改正:
7-3×
| 5 |
| 12 |
=7-
| 5 |
| 4 |
=
| 23 |
| 4 |
(2)错误,
改正:
| 7 |
| 13 |
| 6 |
| 13 |
| 13 |
| 12 |
=
| 7 |
| 13 |
| 1 |
| 2 |
=
| 27 |
| 26 |
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